Doubletree



' (NoMdel.)

E. A. THIEM.

' DOUBLETREE. K No. 380,230. A Patented Mar. 27, 1888'.A

WITNESSES.

UNITED STATES- PATENT OFFICE. v

EDWARD A. THIEM, OF SANDUSKY, OHIO.

DOUBLETREE.`

I SPECIFICATION forming part of Letters Patent No. 380,230, dated March27, 1888.

Application filed November 2l, 1887. Serial No. 255,764. (No model.)

To all whom it. may concern:

Be it known that I, EDWARD A. THIEM, of Sandusky, in the county of Erieand State of Ohio, have invented certain new and useful Improvements inDoubletrees; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which 'it appertains to make and use the same,reference being had to the accompanying drawings, which form apart ofthis specification, and in which- Figure 1 is a top plan view of myimproved doubletree, and Fig. 2 is a horizontalsectional View of thesame.

Similar letters of reference denote corresponding parts in both thefigures.

My invention has relation to that class of doubletrees which are formedof two parts hinged together at their adjacent ends; and it has for itsobject to arrange a spring in such a manner that the free ends of thedoubletree are l permitted to give or yield.

To this end my invention consists in the peculiar construction andcombinationof parts of the same, as will be hereinafter more fully setforth.

In the accompanying drawings, the letter A denotes a doubletree,formedof two parts, B B, each of which is beveled, as shown at C, on its innerforward end, and formed with a'curved recess, D, on the rear inner endopposite the beveled portion.

E E represent two suitable members of a hinge,which are secured togetherby that class of hinge-joint known as a rule-joint,77 the parts beingsecured together by a pivotal bolt,

F, and secured to the rear edge of the doubletree by bolts G, the endsof which project 4o through to the forward4 edge of the doubletree andby means of which two bearing-plates, H, are secured firmly thereto.

I indicates a spring consisting of one or more leaves secured by meansof a stirrup, J, to the V4 5 forward edge of the doubletree, and bearswith its ends upon the bearing-plates H, and is retained thereon againstvertical displacement by bails or keepers K, secured to the doubletree.

The stirrup J, hereinbefore mentioned, is secured firmly to theprojecting ends L of the -serted when my doubletree is secured inoperpivotal bolt F of the hinge, and is formed with registeringapertures M, through which the pivotal bolt of a vehicle is vadapted tobe inative position.

It will be seen that by forming the curved recesses D in the reary innerends of the two parts forming a doubletree a snug seat is'provided forthe rule-joint of the hinge,and that by beveling the forward inner ends,as set forth, the ends of the whiiietree are permitted to yield acertain distance-that is, until the beveled ends meet. It will furtherbe seenr that by the employment of the bearing-plates all the wear ofthe ends of the spring is taken off the doubletree. v

While I have described my device more particularly as applied to adoubletree, it is obvious that the construction can be readily ap- 7oplied to a singletree without departing from the spirit of my invention.

From the foregoing description, taken in connection with theaccompanying drawings, the operation, and advantages of my device willbe so readily seen that further, description of the same is not deemednecessary.

I am aware that it is not new to construct doubletrees in two partshinged together and to arrange a spring in such a manner as to permitthe free ends of the doubletree to yield or give; v neither do I claimsuch construction broadly; but

What I do claim, and desire to secure by Letters Patent of the UnitedStates, is-

1. A spring-doubletree constructed of two parts, the rear inner ends ofwhich are formed with curved recesses and the forward inner endsbeveled, a rule-j ointed hinge, and a pivotal bolt, in combination witha spr-ing and a stirrup,'the ends thereof being connected to theprojecting Vends of a pivotal bolt, substantially asset forth. y

2. A spring-doubletree constructed of two parts, the rear inner ends ofwhich are formed with curved recesses and the forward inner endsbeveled, a rule-jointed hinge, and a pivotal bolt, in combination with aspring, a stir- `rup secured at its ends to the projecting ends o f thepivotal bolt, and ,bails or keepers for roo retaining the ends of saidspring against vertical displacement, substantially as set forth.

otal bolt, in combination with a spring, a stir-4 rup secured at itsends to the projecting ends of the said pivotal bolt, bails or keepers,and I5 bearing-plates, substantially as set forth.

In testimony that I claim the foregoing as my own. I have hereuntoaffixed my signature in presence of two witnesses.

EDWARD A. THIEM.

W'itnesses:

.TOEN BAUER, WALTER W. BOWEN.

